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Finding the Fourth Proportional to 393,310.80, 589,966.20 and 109,000.80

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Solution

The fourth proportional to 393,310.80, 589,966.20 and 109,000.80 is: 163,501.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,310.80 : 589,966.20 = 109,000.80 : x
  2. Step 2: Convert to fraction form
    393,310.80/589,966.20 = 109,000.80/x
  3. Step 3: Cross multiply
    393,310.80x = 589,966.20 × 109,000.80
  4. Step 4: Simplify right side
    393,310.80x = 64,306,787,772.96
  5. Step 5: Solve for x
    x = 64,306,787,772.96/393,310.80
  6. Step 6: Final answer
    x = 163,501.20

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.